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Кавказский энтомол. бюллетень 12(2): 313–316 © CAUCASIAN ENTOMOLOGICAL BULL. 2016
1All-Russian Institute of Plant Protection, Podbelskiy roadway, 3, St. Petersburg, Pushkin 196608 Russia. E-mail: grichanov@mail.ru
1Всероссийский институт защиты растений, шоссе Подбельского, 3, Санкт-Петербург, Пушкин 196608 Россия
2Baran Plant Protection Institute, Markazi Province, Iran
2Баран Институт защиты растений, остан Меркези, Иран
Key words: Diptera, Dolichopodinae, Dolichopodini, Poecilobothrus, new species, Palaearctic Region, Iran, Lorestan.
Ключевые слова: Diptera, Dolichopodinae, Dolichopodini, Poecilobothrus, новый вид, Палеарктика, Иран, Лурестан.
Abstract. A new long-legged fly species Poecilobothrus lorestanicus sp. n. from Iran is described and illustrated. The new species appears to be quite distinct in having male mid tarsus with 2nd and 3rd segments elongated and laterally flattened, covered with dorsal and ventral rows of dense setae; and 4–5th segments with elongated setulae dorsally.
Резюме. Описан новый вид Poecilobothrus lorestanicus sp. n. из Ирана, отличающийся от всех видов рода удлиненными и уплощенными 2 и 3 члениками средней лапки самца, дорсально и вентрально несущими длинные щетинки, а также удлиненными щетинками на 4 и 5 члениках той же лапки. Приведены фотографии ключевых признаков самца и самки.
The genus Poecilobothrus Mik, 1878 belongs to the subfamily Dolichopodinae, tribe Dolichopodini and numbers 14 Palaearctic species and subspecies [Grichanov, 2014]. Morphologically it is close to Hercostomus Loew, 1857, differing by the following combination of characters. Body medium to large size, hind femur with anterior seta positioned at apex, thorax with distinct dark spot above notopleuron, epandrial lobe well developed [Grichanov et al., 2011]. Species of the Poecilobothrus occur in the West Palaearctic countries with relatively mild climate, from southern Scandinavia in the North, to North Africa and Central Asia in the South. The Iranian fauna included 7 Poecilobothrus species. The most comprehensive key to known species of the genus was published by Khaghaninia et al. [2013].
Treating a new material collected during 2016 season from 64 sites in the Markazi and Lorestan provinces, we have found males and females of a new peculiar Poecilobothrus species described below.
The holotype and paratypes of the new species have been sampled by standard sweep net and are housed at the
Zoological Institute of the Russian Academy of Sciences, St. Petersburg (ZIN).
The specimens were studied and illustrated with ZEISS Discovery V-12 stereomicroscope and AxioCam MRc5 camera. Morphological terminology follows Cumming and Wood [2009]. The relative lengths of the podomeres are given in millimeters. Body length is measured from the base of the antenna to the tip of abdominal segment 7. Wing length is measured from the base to the wing apex. Figure showing the male genitalia in lateral view is oriented as they appear on the intact specimen (rotated 180° and lateroflexed to the right), with the morphologically ventral surface of the genitalia facing up, dorsal surface down, anterior end facing right and posterior end facing left.
Poecilobothrus lorestanicus Grichanov et Ahmadi, sp. n.
(Figs 1–8)
Material. Holotype, ♂: Iran, Lorestan Prov., Shirvan, 32°59.93′N, 49°35.28′E, 1456 m, on mud at river bank, 20.06.2016, Ahmadi/250 (ZIN, dried and mounted on pin). Paratypes (ZIN, in ethanol): 4♂, 1♀, same label; 1♂, Iran, Lorestan Prov., Khorram Abad, 33°46.91′N, 48°46.87′E, 1137 m, 20.06.2016, Ahmadi/251.
314 I.Ya. Grichanov, A. Ahmadi
Figs 1–8. Poecilobothrus lorestanicus Grichanov et Ahmadi, sp. n.
1 – male habitus; 2 – male head; 3 – male antenna; 4 – male mid tarsus; 5 – male wing; 6 –hypopygium, lateral view; 7 – female habitus; 8 – female wing. Рис. 1–8. Poecilobothrus lorestanicus Grichanov et Ahmadi, sp. n.
1 – внешний вид самца; 2 – голова самца; 3 – усик самца; 4 – средняя лапка самца; 5 – крыло самца; 6 – гипопигий сбоку; 7 – внешний вид самки; 8 – крыло самки.
bristles; mesonotum with metallic reflection and distinct dark metallic spot above notopleuron; pleura grey pollinose; 6 strong dorsocentral setae; 2 rows of acrostichals; 2 strong notopleural, 1 strong and 2 fine humeral, 1 posthumeral, 1 presutural, 1 sutural, 2 supraalar, 1 postalar setae present. Proepisternum with 1 strong black seta above fore coxa and several short light hairs. Scutellum with 2 strong and 2 small setae and some dorsal and marginal short hairs.
Legs mostly yellow; fore coxa yellow, middle and hind coxa black except for yellow apex; fore and mid tarsus black from apex of basitarsus; apex of hind tibia blackish, hind tarsus black. Fore
coxa with short black hairs anteriorly and several black setae at apex; mid coxa with 1 strong external seta and 1–2 apical setae in addition to black anterior hairs; hind coxa with 1 strong external seta at middle and 1–2 pedunculate apical setae anteriorly. Femora without long hairs. Fore tibia with 1 anterodorsal, 2 dorsal, 2–3 posterior, 2 apical setae, without long apicoventral cilia; fore tarsus simple. Length ratio of fore tibia to tarsus (segments from 1st to 5th), 1.34 : 0.6 : 0.27 : 0.2 : 0.13 : 0.19. Mid femur with 1 anterior and 1 posteroventral subapical setae. Mid tibia with
3 anterodorsal, 2 dorsal, 2 posterodorsal, 1 anteroventral and 3–5 apical setae. 1st segment of mid tarsus with 1–2 apicoventral
A new peculiar species of Poecilobothrus Mik, 1878 (Diptera: Dolichopodidae) from Iran 315
short setae; 2nd–3rd segments elongated and laterally flattened, with dorsal and ventral rows of long setae; 4–5th segments with elongated setulae dorsally (Fig. 4). Length ratio of mid tibia to tarsus (segments from 1st to 5th), 1.83 : 0.86 : 0.32 : 0.25 : 0.17 : 0.17. Hind femur with 1 anterodorsal seta at 3/4 of femora length. Hind tibia with 4 anterodorsal, 4 posterodorsal, 4 anteroventral, 3 apical setae. Hind basitarsus with 1–3 short basoventral and 2 short apical setae; 2nd–5th tarsomeres simple. Length ratio of hind tibia to tarsus (segments from 1st to 5th), 2.11 : 0.61 : 0.57 : 0.42 : 0.27 : 0.24. Wing (Fig. 5) evenly greyish, dark in anterior half, veins brown. Costa simple. R1 reaching to first third of wing length. R2+3 almost straight. Ratio of part of costa between R2+3 and R4+5 to this between R4+5 and M1+2, 49 : 16. R4+5 and M1+2 slightly convex and convergent, joining costa before wing apex. Crossvein dm-cu almost straight, forming right angles with longitudinal veins. Ratio of dm-cu to distal part of CuA1, 50 : 72. Posterior wing margin evenly convex. Anal vein distinct; anal lobe pronounced; anal angle
obtuse. Lower calypter yellow, with black setae. Halters yellow.
Abdomen shining greenish blue, weakly pollinose, narrowly black along sutures, covered with black hairs and setae; 6th–7th segments bluish black, bare; abdominal spiracle 7 invisible; 8th segment with numerous fine black cilia. Epandrium entirely black (Fig. 6). Hypandrium fused with epandrium except apex, simple. Phallus mostly hidden and simple; short basoventral seta on small mound present at base of hypandrium; distoventral epandrial lobe yellow, rounded with beaklike apex, fused with
epandrium, strongly projecting, with short thick seta ventrally and 1 apical short simple setae. Surstylus bilobed; ventral lobe subrectangular, excavated apically, with 1 short thick apical seta; dorsal lobe subtriangular, elongate, slightly longer than ventral lobe, laterally flattened and tapered to an acute upcurved point apically, bearing 1 short apical seta. Postgonite with posterodorsal portion well-developed, with acute ventrally curved medial lobe. Proctiger brushes absent. Cercus black, brown at base, triangular, as long as wide, with long, curved marginal setae, with apical and lateral margin jagged, with elongate digitiform projections.
Length (mm): body 5.5, antenna 1.2, wing 4.9/1.7.
Female (Figs 7–8) similar to male except lacking male secondary sexual characters, otherwise as follows. Face parallel- sided, 1.5 times wider than height of postpedicel; hemitergite 9+10 with 4 thick setae; mid tarsomere length ratio: 0.79 : 0.33 : 0.25 : 0.18 : 0.17.
Length (mm): body 5.5, antenna 1, wing 4.3/1.6.
Diagnosis. Antenna with scape and pedicel mostly yellow, blackish dorsally; postpedicel entirely black; face yellowish grey pollinose, clypeus white pollinose; legs mostly yellow; male mid tarsus with 2nd–3rd segments elongated and laterally flattened, with dorsal and ventral rows of long setae; cercus regularly triangular, large, as long as wide, with long, curved marginal setae, with apical and lateral margin jagged, with elongate digitiform projections.
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Fig. 9. Habitat of Poecilobothrus lorestanicus Grichanov et Ahmadi, sp. n. and Poecilobothrus regalis (Meigen, 1824) in the Lorestan Province, Iran, June 2016.
Рис. 9. Место сбора Poecilobothrus lorestanicus Grichanov et Ahmadi, sp. n. и Poecilobothrus regalis (Meigen, 1824) в остане Лурестан, Иран в июне 2016 года.
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The new species runs to Poecilobothrus comitialis (Kowarz, 1867) in the key of Khaghaninia et al. [2013] that must be modified as follows:
8. Mid tarsus with 2nd–3rd segments elongated and laterally flattened, with dorsal and ventral rows of long setae; 5.5 mm .................................................. lorestanicus sp. n.
– Mid tarsus simple ................................................................. 8a
8a. Scape and pedicel (except dorsal side) reddish yellow; wing weakly and regularly darkened; fore coxa yellow; 4.5–7 ................................................... comitialis (Kowarz)
– Antenna black, scape reddish yellow ventrally at apex; wing distinctly dark in anterior half; fore coxa grey; 4.5–6 ............................................................ ducalis (Loew)
Remarks. Poecilobothrus lorestanicus sp. n. was collected together with much more numerous Poecilobothrus regalis (Meigen, 1824) on mud along a river bank (Fig. 9). Poecilobothrus regalis is a common species distributed from West Europe to Uzbekistan [Grichanov, 2014].
The work of the senior author was partly supported by the Russian Foundation for Basic Research grant N 14– 04–00264–a.
Cumming J.M., Wood D.M. 2009. Adult morphology and terminology [Chapter] 2. In: Manual of Central American Diptera. Vol. 1. (B.V. Brown, A. Borkent, J.M. Cumming, D.M. Wood, N.E. Woodley,
M.A. Zumbado eds). Ottawa: NRC Research Press: 9–50.
Grichanov I.Ya. 2014. Alphabetic list of generic and specific names of predatory flies of the epifamily Dolichopodoidae (Diptera). Plant Protection News, Supplements. 14: 3–544. Available at: https://archive. org/details/Grichanov2014DoliBank (accessed 26 September 2016).
Grichanov I.Ya., Selivanova O.V., Negrobov O.P. 2011. A brief synopsis of Palaearctic genera of the family Dolichopodidae (Diptera). Ukrainska entomofaunistyka. 2(2): 11–40.
Khaghaninia S., Gharajedaghi Y., Grichanov I.Ya. 2013. Study of the genera Hercostomus Loew, 1857 and Poecilobothrus Mik, 1878 (Diptera: Dolichopodidae) in Kandovan Valley with new records for Iran. Biharean Biologist. 7(2): 73–79.